Noise coming from engine at 3450 RPM-3550 RPM

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01-22-2007, 05:51 PM

avangusva

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Noise coming from engine at 3450 RPM-3550 RPM

It sounds like a metal on metal contact, and possibly a loose metal part hitting another metal part. It only happen at around 3500 RPM on my 99 civic EX. Any ideas?

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01-22-2007, 08:11 PM

jordanhxc

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VTAK!!!!!
......Just Kidding

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01-23-2007, 03:34 AM

lowbrow

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Heat shield from your exhaust manifold? I had the same issue with my old 97 LX once... just ripped it off and stopped the problem.

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01-23-2007, 06:56 AM

raiden571

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possibly needs a valve adjustment, but im leaning toward the heat shield idea.
kind of hard to diagnose a sound over the internet

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01-23-2007, 12:47 PM

avangusva

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Is anything going to be afected if i remove said heat sheild? The one right behind the radiator, on the exhaust manifold?

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01-23-2007, 03:17 PM

JoePoonani

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Quote:

Originally Posted by avangusva

Is anything going to be afected if i remove said heat sheild? The one right behind the radiator, on the exhaust manifold?

It won't hurt anything, you'll shave off 13 ounces y0!! :irock:

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01-23-2007, 05:03 PM

project_hatch

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only thing it does is reflect the heat from going towards the radiator, I run a header with no header wrap and have never over heated so it would be fine if you took it off.